T1S1/S2-12

The Rockford Fosgate T1S1-12 and T1S2-12 from the Power T1 Slim series combine powerful bass reproduction with an exceptionally slim design. With a power handling capacity of 600 watts RMS and an installation depth of just 76.5 mm, these high-quality 30 cm (12-inch) subwoofers are ideal for high-performance car audio systems with limited installation space.

Thanks to the special split-yoke motor technology, a powerful neodymium magnet system, and the robust fiberglass cone, these subwoofers deliver precise, dynamic, and powerful bass reproduction. The integrated copper cap improves heat dissipation and reduces unwanted distortion.

The sturdy die-cast aluminum construction, the dual Nomex centering spider, and the generously sized 76-mm voice coil ensure high power handling and reliable performance. Both models are specifically optimized for sealed subwoofer enclosures.

The T1S1-12 has a 1-ohm voice coil, while the T1S2-12 is equipped with a 2-ohm voice coil. This allows you to select the appropriate model based on the amplifier's impedance requirements.

Technical Specifications

• Manufacturer: Rockford Fosgate

• Series: Power T1 Slim

• Model: T1S1-12 / T1S2-12

• Product Type: Flat Subwoofer / Slim Subwoofer

• Nominal diameter: 30 cm (12 inches)

• RMS Power Handling: 600 watts

• Maximum power handling: 1,200 watts

• Impedance T1S1-12: 1 ohm

• Impedance T1S2-12: 2 ohms

• Voice coils: 1 x Single Voice Coil (SVC)

• Voice coil diameter: 76 mm (3 inches)

• Voice coil construction: 4-layer

• Voice coil winding height: 19 mm

• Frequency range T1S1-12: 27–250 Hz

• Frequency range T1S2-12: 28–250 Hz

• Efficiency: approx. 84 dB

• Linear diaphragm stroke (Xmax): ±15 mm

• Maximum mechanical diaphragm stroke: ±30 mm

• Effective membrane area (Sd): 560 cm²

• Diaphragm material: fiberglass

• Dust cover: Aluminum

• Bead: Foam

• Centering spider: Dual Nomex centering

• Basket material: Die-cast aluminum

• Magnet system: Neodymium

• Magnet weight: approx. 409 g

• Engine Technology: Split-Yoke Pass-Through

• Integrated copper cap for heat dissipation and distortion reduction

• Optimized for enclosed housings
  
  

Thiele-Small parameters

T1S1-12 (1 ohm)

• Resonance frequency (Fs): 36 Hz

• Overall Quality (Qts): 0.89

• Equivalent volume (Vas): 32.2 liters

• Linear stroke (Xmax): ±15 mm

T1S2-12 (2 ohms)

• Resonance frequency (Fs): 37 Hz

• DC resistance (Re): 1.7 ohms

• Mechanical Grade (Qms): 11.22

• Electrical quality (Qes): 1.17

• Total quality (Qts): 1.06

• Equivalent volume (Vas): 32.2 liters

• Voice coil inductance (Le): 0.45 mH

• Mass in motion (Mms): 255.2 g

• Force factor (BL): 9.14 N/A
  
  

Dimensions

• Outer diameter: 330 mm

• Installation diameter: 285 mm

• Hole diameter: 312 mm

• Installation depth: 76.5 mm

• Displacement volume according to the manufacturer's manual: approx. 1.42 liters
  
  

Recommended Case

• Recommended enclosure type: Enclosed

• Enclosed housing T1S2-12: 31 liters

• Alternative bass-reflex enclosure T1S2-12: 56.6 liters

• Bass reflex tuning frequency T1S2-12: 35 Hz

• T1S2-12 bass reflex port area: 80 cm²

• Bass reflex port length T1S2-12: 33 cm
  
  

What's Included

• 1 Rockford Fosgate Power T1 Slim Subwoofer T1S1-12 or T1S2-12 (depending on the selected model)

• 1 x Mounting Ring / Decorative Ring

• Product Documentation